Conduit mold



June 12, 1928. 1,673,167

D. D. TRACY CONDUIT MOLD Filed June 7, 192a 2 Sheets-Sheet 1 VAVA A 4' 1T- 1 l/VVE/VfOR Dal/(d D. Wac B y 6% AMQ9 A from V5 June 12, 1928.1,673,167

D. D. TRACY CONDUIT' MOLD Filed June 7, 1926 2 Sheets-Sheet 2 Dal/id J7.Tracy ll MENTOR A TTORNEYS Patented June 12, 1928.

PATENT OFFICE.

DAVID D. TRACY, 0F JACKSON, MICHIGAN.

CONDUIT MOLD.

Application filed June 7, 1926.- Serial No.-114,171.

This application is a continuation in part of my application for LettersPatent, filed Nov. 2, 1925, Ser. #66306.

The main objects of this invention are:

First, to provide an improved conduit mold which is well adapted for usein the manufacture of conduits of large dimensions for sewers, waterconduits and other purposes.

Second, to provide an improved conduit mold which is capable of veryrapid manipulation.

Third, to provide an improved conduit mold which can be readily set upor knocked down without liability of injuring the molded section.

Objects relating to details and economies of construction and operationof my invention will definitely appear from the detailed description tofollow. The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearlyillustrated in the accompanying drawing forming a part of thisapplication, in which:

Fig. 1 is a side elevation of conduit mold.

Fig. 2 is a plan view thereof.

Fig. 3 is a fragmentary vertical section on a line corresponding to line3-3 of Fig. 2 with the mold filled.

Figi is a plan view of the base of the mold.

. Fig. 5 is a fragmentary section on a line corresponding to line 5-5 ofFigs. 2 and 4.

Fig. 6 is a fragmentary section on a line corresponding to line 66 ofFigs. 2 and 4.

Fig. 7 is a fragmentary elevation of the inner wall.

Fig. 8 is a plan view of the top ring of the form or mold.

Fig. 9 is a fragmentary inside view of the inner wall with the top ringin position.

Fig. 10 is a fragmentary side elevation with the latch in disengagedposition.

Fig. 11 is a detail vertical section on a line corresponding. to line1111 of Figs. 10 and 12 showing further details of th latch.

Fig. 12 is a detail horizontal section on a line corresponding to line1212 of Fig. 11.

Fig. 13 is a detail section corresponding to that of Fig. 12 with thelatch disengaged.

Referring to the drawing, the base 1 is provided with an outer annularshoulder 2 and an inner annular shoulder 3, the inner shoulder having apositioning lug 4 pro my improved jecting therefrom, the shouldershaving pins 5 projecting from their faces. The base, between theseshoulders, is suitably conformed to shape or form the ends of theconduit section, the base in the structure illustrated having an outersegmentalrib-like portion 25 and an inner segmental portion 26 arrangedwith the ends in overlapping relation as shown. These portionsare-adapted to form the end of the conduit with inner and externalrecesses adapted to receive calking material when the end of the conduitsection is placed in abutting relation to a coacting conduit section.

The inner form wall is made up of three complementary longitudinalsections, 6 having joint bars 7 secured at one edge thereof so as toproject into overlapping relation with the coacting edge of the adjacentsection, thus forming a closed joint when the parts are securedtogether. These joint bars 7 are preferably formed of angle iron withtheir angles facing inwardly, the inwardly projecting arms 8 havingslots 9 therein to receive the latches 10 which are pivoted at 11 onthereinforce bars 7 to project through the slots. The reinforce bars 12 aresecured in spaced relation to the underlapping edges of the sections andare provided with keepers 12 to receive the latches. This provides ameans for quickly securing the sections together and a means which canbe readily released even when the form is filled. The sections are alsovery rigidly supported in position. One of the inner wall sections has anotch 13 in the bottom thereof coacting with the positioning lug 4:. v

The outer wall comprises complementary sections 14 having joint bars 7and reinforce bars 12 corresponding to the joint and reinforce barsofthe inner wall sections. The wall sections have holes 15 therein toreceive the pins 5, thus detachably securing the walls to the base. I

A top ring 16 is provided, fitting within the inner wall section, thebars 7 and 12 being spaced at their upper ends from the upper ends ofthe walls to receive this ring. The ringhas hooks 17 thereon engagingthe joint bars 7 for detachably securing the ring in place. i

The inner wall sections have notches 18 in their upper edges adapted toreceive the radial projecting arms 19 of the ring which constitutespacing members tor the upper ends of the mold walls.

Thebase 1 has sockets Q Otherein adapted to receive the lower ends ofthe reinforceand 5 ceive the upper ends of the bars 21.

In the embodiment illustrated, the foraminated reinforcing elements 23.are supported by these bars 21, the upper ends of the elements 23beingfurther'supportedby "thef:

tu'dinal reinforcing bars spaced" from their spacing-blocks 2a which arenotched on: their under edges to receive'the reinforcing-elen'ent.

By thusl arrangingthei parts, provide a 1 "knocked downyiswell'adaptedfor the r'noldmoved without likelihood of injuring ingpflarge'conduitsandflcan 'be easily rethe conduit.

-By engaging. the-wall sections 'withrthe ;pins: 5'ia'nd 'isecuringrthetop ringby'ineans '=of'thef'hooks,'tlie parts are eftectivelywse curedtogether so that the weightofthe ce- ,IIlIltT and tainping and jarringtolwhich it is subjected in molding does not separatethe -parts. 'At thesame time-they may be quick- -rfgard' as verypractical. -I have notattempted be: desired.

r ly separated when it is desired to knockdown the mold. I I H I haveillustrated and described my improvements in an-embodiment which I re-"to illustrate or describe certain modifications :or': adaptations "as;I believe the disclosure 1 made will enable those skilled-in the-:artto.-,embody or adapt my improvements as may Having thus described my-invent-ion what I claim as newand desireto secure byLetters Patent, is;

' :lmIn'a; moldgforconduits, the combination of a base member-havinginner and outer form wall support-s, ail-inner wall po 'sitioninglug'and' wall engaging? pins thereon,v said base having reinforcesockets therein, inner and outeraform walls, each-cornprising aplurality-of longitudinalfcornplc- ,mentary sections provided withjoint'bars disposed to project beyond one" edge of the sections inoverlapping relation to the edges 'of'the adjacent sections, saidsections being alsovprovided with longitudinal reinforcing bars spacedfrom their overlapping edges, one of the inner wall sections being;notched atits lower endto engage-said positioning lugonsaid base, wallsections havingholes "to receive said pins, hooks pivotally mounted onsaid reinforcing bars to engage. saidajoint bars whereby the sectionsaredetachably'secured together, a: supporting ring engaging the upper endof said inner wall and having ;-radial arms constituting spacing membersfor the outer wall, said arms having reinforce sockets alined'with saidrein-force sockets in said base, and hooks zon-saidring detachablyconnecting the same with' saidsjoint bars.

, 2. In a mold'for conduits, the combination 0f a base member havinginner and outer form wall supports, inner and outer form walls,"'ea'chcomprising a plurality of longitudinal complementary sections providedwith'joint bars disposed to project beyond overlapping edges, the innerwall sections having-notches inthelr upper ends, hooks pi',vota1lymounted on said reinforcingbars mold which maybe very quickly set up or-ti'onscarej 'detachably' secured together, a supporting ringengaging'the upper end of said to engagesaid joint bars whereby thesecinner wall and having radial arms engaging tsa'id notches -thereinand constituting spacfoneedge of thesections tin overlapping relavtiontor'the edges-of theadjacent sections,

said sectionsqbeing, also" provided with longitudinal ;reinforcing bars,spaced from their overlapping; edges, hooks pivotally mounted on saidreinforcing bars to engage said joint bars whereby thesections aredetachab'ly secured together, a supporting ring engaging the upper endofsaid inner wall andhaving radi al' arms constituting spacing -membersfor the';outer-wall,and hooks on said ring detachablyconnectingrthe'same with said joint bars. I, V

4. In a mold for conduits, the combination et: abase member adapted toreceive inner rand outer form avalls and having an inner wallpostioninglug said base having reinforce sockets therein, inner and outerwalls comprising longitudinal complementary sections detachablyconnected together, the innerwa'll having anotch in *its lower end toengage said positioning lug and notches in ,its upper end, a supportingring engaging the-inner wall and having radial arms constituting spacingmembers "for the outer wall,

said arms having reinforce sockets therein aligned with saidreinforce;sockets iirsaid. "base and' means for detachably connecting said ringwitlnsaid inner wall.

1 5. Ina mold for conduits, the-combination of a'b'ase member adapted'toreceive inner and outer form,walls;"and having an inner lr'wa-llipositioning lug, said-base having reinforce} sockets therein, inner andouter walls com-prising,- longitudinal complementary sections detachablyconnected together, the inner wall having a-notch in its lower end toengage said positioning lug and notches in its; upper end, and asupporting ring en-i gaging the inner wall and having radial ets thereinalined with said reinforce sockets in said base.

6. In a mold for conduits, the combination of a base member adapted toreceive inner and outer form walls andhaving an innerwall positioninglug and wall engaging pins, inner and outer walls comprisinglongitudinal complementary sections detachably connected together, thewalls having holes to engage said pins, the inner wall having a notch inits lower end to engage said positioning lug, a. supporting ringengaging the inner wall and having radial arms constituting spacingmembers for the outer wall, and means for detachably connecting saidring with said inner wall.

7 In a mold for conduits, the combination of a base member adapted toreceive inner and outer form walls and having an inner wall positioninglug, inner and outer walls com prising longitudinal complementarysections detachably connected together, the inner wall having a notch inits lower end to engage said positioning lug, and a supporting ringengaging the inner wall and having radial arms constituting spacingmembers for the outer wall.

8. In a mold for conduits, the combination of a base member having innerand outer form wall supporting shoulders thereon, the inner shoulderhaving a positioning lug projecting therefrom, the base having aproject- 'ing pin thereon, inner and outer form walls each comprising aplurality of longitudinal complementary sections, one of the wallsections having a hole to receive said pin, and one of the inner wallsections being notched to engage said lug, means for detachablyconnecting said sections to each other, and a spacing ring detachablyconnected to the inner wall.

9. In a mold for conduits, the combination of a base member having innerand outer form wall supporting shoulders thereon, the inner shoulderhaving a positioning lug projecting therefrom, one of the shouldershaving projecting pins thereon, inner and outer form walls eachcomprising a plurality of longitudinal complementary sect-ions, one ofthe wall sections having a hole to receive said pin, and one of theinner wall sections being notched to engage said lug, and means fordetachably connecting said sections to each other.

10. In a mold for conduits, the combination of a base member adapted toreceive inner and outer form walls, inner and outer walls comprisingcomplementary sections detachably connected together, the inner wallhaving notches in its upper end, and a supporting ring fitting withinthe inner wall and' haiving radial arms engaging said notches thereinconstituting spacing mem-' here for the outerl'wall.

11. In .a; mold [for conduits, the combina- "tion of a 'base memberadapted to receive 'inner'and outer form walls, inner and outer wallscomprising longitudinal complementarysections detachably connectedtogether,

a supporting ring engaging the inner wall g and having'radial armsconstituting spacing members for the outer wall, sald base member andarms having alined reinforce sockets.

12. In a mold for conduits, the combination of a base adapted as a formwall support, a wall comprising a plurality of longitudinalcomplementary segmental sections provided with angle iron joint barsdisposed to project beyond one edge of the sectionsin overlappingrelation to the edges of the adjacent sections, said sections being alsopro vided with longitudinal reinforcing bars spaced from theiroverlapping edges, the projecting angles of said joint bars beingslotted, and latches pivotally mounted on said joint bars to swing insaid slots in the projecting angles thereof, said reinforce bars beingprovided with upwardly facing kee ers with which said latches areengageab e.

13. In a mold for conduits, the combination of a base adapted as a formwall support, awall comprising a plurality of longitudinal complementarysegmental sections provided with angle iron joint bars disposed toproject beyond one edge of the sections in overlapping relation to theedges of the adjacent sections, the projecting angles of said joint barsbeing slotted, and latches pivotally mounted on said joint bars to swingin said slots in the projecting angles thereof, saidreinforce bars beingprovided with upwardly facing keepers with which said latches areengageable.

111. In a mold for conduits, the combination of a base adapted as a formwall support, a wall comprising a plurality of longitudinalcomplementary sections provided with joint bars disposed to projectbeyond one edge of the sections in overlapping relation to the edges ofthe adjacent section, said sections being also provided with longitudina-l reinforce bars spaced from their overlapping edges, the outwardlyprojecting angles of the joint bars being slotted, latches pivotallymounted on said joint bars to swing in said slots thereof, the walls ofthe slots constituting supports for said latches, and coacting upwardlyfacing hook-like keepers on said reinforcing bars, the latches beingprovided with lugs adapted to engage the ends thereof.-

15. In a mold for conduits, the combination of a base member, inner andouter form walls detachably mounted thereon and each comprising aplurality of Ion itudinal complementary sections provided with jointchars-disposed tofprpject beyondmne edge of @the seetiensinmoyerlapping; relation v11:0 \the Ibarsdisposed'to hi the seetionsinovei'lapping relation to the edges (if/the adjacent sections, and a 'sup7 edges of the adjacept sections, the inne rryvhll l -sejct10ns shaving!notches in their,uppen ends,

5 -and.- a spppqrting ring fittinglwi'thm the up- -pl end. ofsaid inner211 a i'dhaving redial rms-engagmg sand notches :therem and con- -stitut ing spacmgwmembersflfor theeutenwall. I21-,n101d1f0re0Iidi1its,jtheeombina m tien of a basemember, inner aridouter iqrmvwalls; detaehably mounted thereon and .each comprising aplurality .of longitudipal complementary sections provided. with jolntprject beyond one edge porting ring engaging the upperend' of said inner=wa 11 and having radialarms'constit11tin gspaclng members for the;outer Wall.

I111 Witness wheredfl havehereuntoset 20 my h n i DAVID iDJTRACY.

